Telecommunications – Transmitter and receiver at same station
Patent
1996-09-18
1999-03-30
Vo, Nguyen
Telecommunications
Transmitter and receiver at same station
455338, 333217, 330109, H04B 140
Patent
active
058900586
ABSTRACT:
In an FDNR type active filter fabricated on an integrated circuit, an FDNR circuit is provided wherein one ends of a first capacitor and an impedance element are connected to an inverted input of an operational amplifier, one ends of the impedance element and a second capacitor are connected to an output end of the operational amplifier, and the other ends of the first and second capacitors are connected to each other. To the impedance element, resistors are connected in series. To the connecting end of the resistors, one end of another resistor is connected, the other end thereof being grounded in an alternating current form. The capacity value of the second capacitor is greater than that of the first capacitor.
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R. E. Massara, "FDNR realisation of all-pole LPF", IEE Proc., vol. 128, pt. G, No. 4, pp. 195-197, Aug. 1981.
Itakura Tetsuro
Tanimoto Hiroshi
Ueno Takashi
Kabushiki Kaisha Toshiba
Vo Nguyen
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